$1.00 per Year. ($1.12 to Foreign Countries.) lOcts. a copy. 
THE 
NAUTILUS 
A MONTHLY 
DEVOTED TO THE INTERESTS 
OF CONCHOLOGISTS. 
EDITOR : 
H. A. Pilsbry, Conservator Conchological Section, Academy of Natural Sciences, Philadelphia. 
ASSOCIATE EDITOR : 
C. W. Johnson, Curator of the Wagner Free Institute of Science. 
Vol. VIII. OCTOBER, 1894. No. 6. 
CONTENTS : 
PAGE. 
The American Species of Carychium. By Henry A. Pilsbry. . . 61 
List of Shells from the Vicinity of Mingusville, Montana. By 
Homer Squyer. .......... 63 
Note on Helcioniscus nigrisquamatus Reeve, Sp. By Geo. W. Taylor. 66 
Perostylus, the Embryo of Megalatractus. By H. A. PiLbiy. . 67 
Catalogue of Land Shells of Long Island, N. Y. By Henry Prime. 69 
General Notes.71 
Published by 
H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelphia. 
C. W. JOHNSON, Manager, Wagner Free Institute of Science, Philad’a. 
Entered at Philadelphia Post-Office as second-class matter. 
